A parallel plate capacitor is formed by two plates each of area 30 π cm^2 separated by 1 mm. A material of dielectric strength 3.6 × 10^7 Vm^-1 is…

A parallel plate capacitor is formed by two plates each of area $\displaystyle 30 \pi \mathrm{~cm}^2$ separated by $\displaystyle 1$ mm . A material of dielectric strength $\displaystyle 3.6 \times 10^7 \mathrm{Vm}^{-1}$ is filled between the plates. If the maximum charge that can be stored on the capacitor without causing any dielectric breakdown is $\displaystyle 7 \times 10^{-6} \mathrm{C}$, the value of dielectric constant of the material is : $\displaystyle \left[\right.$ Use $\displaystyle \left.\frac{1}{4 \pi \varepsilon_{\mathrm{o}}}=9 \times 10^9 \mathrm{Nm}^2 \mathrm{C}^{-2}\right]$